Question

F(x)=ax+b
f(1)=3
f(2)=5
tentukan fungsinya

Answer 1

F(1)=3 -> a+b=3
f(2)=5 -> 2a+b=5

a+b=3
2a+b=5
dieliminasi
a=2 b=1
fungsi : f(x) = 2x+1